“One of the world’s oldest libraries is offering a rare glimpse of key artifacts that have helped define human history.The exhibition is entitled “Lines of Thought: Discoveries that Changed the World” allows visitors to peruse parts of Cambridge University Library’s 600-year-old collection.Librarian Anne Jarvis described it as an opportunity to a walk “around the world’s mind.” (via NBC News)

“Being a well-known writer and longtime resident of Cambridge, Katherine A. Powers can be excused for expecting to find her latest book on the shelves of the local library. After all, the book about her father, the late writer J.F. Powers, has been widely reviewed, with words of praise appearing in The New Yorker, The Wall Street Journal, the Los Angeles Times, and The Boston Globe. (Powers wrote a column for the Globe for 20 years.) But after a recent visit to the Cambridge Public Library revealed that the book, “Suitable Accommodations: An Autobiographical Story of Family Life: The Letters of J.F. Powers, 1942-1963,” is not, in fact, part of the library’s collection, Powers offered to donate a copy. The library’s answer? Thanks, but no thanks. Citing a policy intended to discourage the public from dumping their unwanted volumes on the library’s doorstep, three employees of the library declined Powers’s offer.” (via Boston.com)